CCalendarSect::Delete

static function Delete($id, $checkPermissions = true, $params = [])
{
	global $DB;
	$id = (int)$id;

	$sectionFields = self::GetById($id);
	$canEdit = $sectionFields['PERM']['edit'] ?? false;
	if ($checkPermissions !== false && !$canEdit)
	{
		return CCalendar::ThrowError('EC_ACCESS_DENIED');
	}

	$meetingIds = [];
	if (Util::isSectionStructureConverted())
	{
		$strSql = "select CE.ID, CE.PARENT_ID, CE.CREATED_BY
			from b_calendar_event CE
			where CE.SECTION_ID=".$id."
			and (CE.IS_MEETING='1' and CE.IS_MEETING is not null)
			and (CE.DELETED='N' and CE.DELETED is not null)";
	}
	else
	{
		// Here we don't use GetList to speed up delete process
		// mantis: 82918
		$strSql = "SELECT CE.ID, CE.PARENT_ID, CE.DELETED, CE.CREATED_BY, CES.SECT_ID, CES.EVENT_ID
			FROM b_calendar_event CE
			LEFT JOIN b_calendar_event_sect CES ON (CE.ID=CES.EVENT_ID)
			WHERE CES.SECT_ID=".$id."
			AND (CE.IS_MEETING='1' and CE.IS_MEETING is not null)
			AND (CE.DELETED='N' and CE.DELETED is not null)";
	}

	$res = $DB->Query($strSql , false, "File: ".__FILE__."
Line: ".__LINE__);
	while($ev = $res->Fetch())
	{
		if ((int)$ev['ID'] === (int)$ev['PARENT_ID'])
		{
			$meetingIds[] = (int)$ev['PARENT_ID'];
			CCalendarLiveFeed::OnDeleteCalendarEventEntry($ev['PARENT_ID']);
		}

		$pullUserId = (int)$ev['CREATED_BY'] > 0 ? (int)$ev['CREATED_BY'] : CCalendar::GetCurUserId();
		if ($pullUserId)
		{
			BitrixCalendarUtil::addPullEvent(
				'delete_event',
				$pullUserId,
				[
					'fields' => $ev,
				]
			);
		}
	}

	if (!empty($meetingIds))
	{
		$DB->Query("DELETE from b_calendar_event WHERE PARENT_ID in (".implode(',', $meetingIds).")", false, "File: ".__FILE__."
Line: ".__LINE__);
	}

	//delete section in services
	self::onDeleteSync($id, [
		'originalFrom' => $params['originalFrom'] ?? '',
	]);

	// Del link from table
	if (!Util::isSectionStructureConverted())
	{
		$DB->Query("DELETE FROM b_calendar_event_sect WHERE SECT_ID=".$id, false, "FILE: ".__FILE__."
 LINE: ".__LINE__);
	}

	// Del from
	$DB->Query("DELETE FROM b_calendar_section WHERE ID=".$id, false, "FILE: ".__FILE__."
 LINE: ".__LINE__);

	CCalendarEvent::DeleteEmpty();
	self::CleanAccessTable();
	CCalendar::ClearCache(array('section_list', 'event_list'));

	foreach(EventManager::getInstance()->findEventHandlers("calendar", "OnAfterCalendarSectionDelete") as $event)
	{
		ExecuteModuleEventEx($event, array($id));
	}

	$pullUserId = (int)$sectionFields['CREATED_BY'] > 0 ? (int)$sectionFields['CREATED_BY'] : CCalendar::GetCurUserId();
	if ($pullUserId)
	{
		Util::addPullEvent(
			'delete_section',
			$pullUserId,
			[
				'fields' => $sectionFields,
			]
		);
	}


	return true;
}